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凸透鏡
凸透镜
tū
tòu
jìng
convex lens
CEDICT
(physics) convex lens
convex lens
Wiktionary
Entry Composition
1
凸
tū
to stick out; protruding; convex; male (connector etc)
Taiwan pr.
tú
2
透鏡
tòu
jìng
lens (optics)